142042140 has 96 divisors (see below), whose sum is σ = 467933760. Its totient is φ = 35647488.

The previous prime is 142042129. The next prime is 142042141. The reversal of 142042140 is 41240241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142042141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1444 + ... + 16916.

It is an arithmetic number, because the mean of its divisors is an integer number (4874310).

Almost surely, 2^142042140 is an apocalyptic number.

142042140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142042140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233966880).

142042140 is an abundant number, since it is smaller than the sum of its proper divisors (325891620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142042140 is a wasteful number, since it uses less digits than its factorization.

142042140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15508 (or 15500 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 142042140 is about 11918.1433117747. The cubic root of 142042140 is about 521.7619472087.

Adding to 142042140 its reverse (41240241), we get a palindrome (183282381).

The spelling of 142042140 in words is "one hundred forty-two million, forty-two thousand, one hundred forty".